<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
	<title>{{title}}</title>
</head>
<body>
<h1>hello {{user.name}}</h1>
<li>you are {{user.age}}</li>
<li>{{book_list.0}}</li>
<li>{{user.say}}</li>
{% if user %}
	<li>name: {{user.name}}</li>
{% else %}
用户不存在
{% endif %}
</body>
</html>